MULTIMEDIA COLLEGE JALAN GURNEY KIRI 54100 KUALA LUMPUR THIRD, FOURTH & SIXTH SEMESTER EXAMINATION, 2013 SESSION DTEW-E-F-3/11, DTEW-E-F-1/12, DTEA-E-F-3/11, DTEA-E-F-1/12, DTET-E-F-1/12, DTEQ-E-F-1/11, DTEQ-E-F-1/12, DTES-E-F-3/11, DTES-E-F-1/12 EGR2093 TELECOMMUNICATION SYSTEM I SITI HAJAR BT MD AZIZ, MUHAMMAD FAIZUL BIN IDRIS, AHMAD NAJMI BIN A. RAHMAN, SHARUL AZHAR BIN ISMAIL, SLYVISTER MAX WELL GILUX INSTRUCTION TO STUDENT 8 APRIL 2013 9.00 AM 11.30 AM (2 ½ Jam / Hours) 1. This Examination paper has THIRTEEN (13) printed pages. 2. This question paper consists of FOUR (4) sections. Section A : Answer ALL questions. Section B : Answer ALL questions. Section C : Answer ALL questions. Section D : Answer ONE (1) questions ONLY. 3. Please write all your answers in the Answer Booklet provided.
BAHAGIAN A : SOALAN OBJEKTIF - (10 MARKAH) SECTION A : OBJECTIVE QUESTIONS - (10 MARKS) ARAHAN : JAWAB SEMUA SOALAN. INSTRUCTION : ANSWER ALL QUESTIONS. 1. Fungsi Telekomunikasi, rujuk kepada, / The Role of Telecommunications, is refer to, A. Connecting People throughout the globe. B. Exchange Information for long distance. C. Faster transfer the information throughout the world. D. All of above 2. Jenis System Telekomunikasi? / Telecommunication System Types? A. Wireline & Wireless B. 2MHz & 2 MBit C. Analog & Digital D. Switching & Transmission 3. "CDR - Call Detail Recording" diambil secara automatik dari pusat pengebilan. Format terkini yang digunakan oleh ibusawat SPC di Malaysia di dalam proses pengebilan akaun pelanggan adalah? CDR - Call Detail Recording are automatically retrive from Billing Centre. At present, most switching exchange in Malaysia using what type of Collecting Charging Information? A. Photograph B. Magnetic Tape C. CDIS D. CAMA SHMA/MFI/ AN / SAI /SMW Page 2 of 13
4. "Kedua-dua pihak mesti ada sepanjang tempoh panggilan dan pautan mesti ada untuk tempoh panggilan". Apakah Switch ini? "Both parties must be available throughout the duration of call and link must be available for the duration of the call": What type of Switch? A. Stoke and Forward Switch B. Message Switch C. Circuit Switch D. Packet Switch 5. Yang manakah yang berikut membawa maklumat dalam telekomunikasi? Which of the following carry an information in telecommunications? A. Signal / Signal B. Rangkaian / Network C. Pembawa / Bearer D. Perantara / Media 6. Soft Switch TM NGN terletak di lapisan. TM NGN Soft Switch is located at layer. A. Application B. Metro E C. Control D. Core SHMA/MFI/ AN / SAI /SMW Page 3 of 13
7. Semua ibusawat di Malaysia, waktunya telah diseragamkan. Apakah nilai yang digunakan utk "synchronized". The incoming bit rate (store in the buffer) and the rate of exchange clock must be synchronized. What is the rate commonly used by the exchange in Malaysia. A. 2.048 Mbit B. 1.55 MHz C. 2.048 MHz D. 75Ohm 8. Sukatan yang digunakan untuk mengukur kekerapan panggilan pada waktu sibuk, adalah dikenali sebagai. The volume of communication flowing through the circuit unit for Traffic is. A. MHz B. Decibel C. Erlang D. Newton 9. Pilih yang BUKAN fungsi lapisan ketiga protokol ISDN./ Select which is NOT ISDN protocol layer3 function. A. Status Enquiry B. Setup C. Alerting D. Error Correction SHMA/MFI/ AN / SAI /SMW Page 4 of 13
10. Berapakah nilai bekalan kuasa peralatan PSTN?/ What is the value of PSTN power supply? A. + 48 V DC B. - 48 V DC C. 48 V AC D. Non above SHMA/MFI/ AN / SAI /SMW Page 5 of 13
BAHAGIAN B : BETUL (B) ATAU SALAH (S) - (10 MARKAH) SECTION B : TRUE (T) OR FALSE (F) - (10 MARKS) ARAHAN : JAWAB SEMUA SOALAN. INSTRUCTION : ANSWER ALL QUESTIONS. 1. Node Telekomunikasi adalah seperti berikut:- Pelanggan /Suis/ Pemancar/ Perkhidmatan./ Telecommunication nodes are:- Customer node / Switching Node / Transmission Nodes / Services Nodes. 2. Isyarat Pemancar : Pemancar jenis PDH,/ Signal Transmission : PDH Transmission, Malaysia (E1) 8KHz voice sampling rate 8 bit samples 30 voice channel 2.048 Mbps 3. Kad BRI disambungkan ke PABX?/ BRI card is connected to PABX? 4. Ibusawat SPC bermakna CPU akan melaksanakan program yang disimpan di dalam memori untuk melaksanakan sambungan pensuisan dan mengendalikan panggilan./ SPC Exchange means CPU will execute a program stored in memory to perform the switching connection and handling a call. 5. TM NGN akan menggantikan PSTN./ TM NGN will replace PSTN. 6. Suatu kod unik yang dikenal pasti untuk mesej laluan ke destinasi yang betul. Ini dicapai dengan memperuntukkan kod Point Isyarat ke setiap lokasi./ A uniquely identifiable code in order to route message to the correct destination. This is achieved by allocating a Signalling Point code to each location. 7. PSTN akan disambungkan sertamerta ke bekalan janakuasa sedia tunggu apabila bekalan kuasa komersial terputus./ PSTN is immediately connected to static standby generator when commercial power supply breakdown. SHMA/MFI/ AN / SAI /SMW Page 6 of 13
8. Holding Time adalah masa dimana panggilan masih dalam status aktif./ Holding Time is the time during when exchange or circuit is continuously occupied by a cell. 9. SS7 ada dalam sistem SoftX3000 (NGN SoftSwitch) dan ianya dapat berinteraksi dengan PSTN yang sediaada./ SoftX3000 (NGN SoftSwitch) support SS7 and implements interworking with the existing switched circuit networks. 10. SoftX3000 adalah terletak pada lapisan kawalan SoftSwitch./ As a softswitch product, softx3000 is located at the core control layer of NGN scheme. SHMA/MFI/ AN / SAI /SMW Page 7 of 13
BAHAGIAN C : SOALAN PENDEK - (50 MARKAH) SECTION C : SHORT QUESTIONS - (50 MARKS) ARAHAN : JAWAB SEMUA SOALAN. INSTRUCTION : ANSWER ALL QUESTIONS. 1. a) Lukiskan dengan lengkap rajah blok untuk system telekomunikasi. Draw the block diagram for telecommunication system. (3 Markah / Marks) b) Terangkan peranan telekomunikasi. Explain the role of telecommunications. (3 Markah / Marks) c) Apakah QoS dan bagaimanakah mencapainya dalam telekomunikasi? What is QoS and how to achieve it in Telecommunications? d) Senaraikan 5 task untuk telekomunikasi. List down 5 telecommunication task. SHMA/MFI/ AN / SAI /SMW Page 8 of 13
2. a) Senaraikan tiga (2) backup untuk bekalan kuasa PSTN. Apakah fungsi pembumian dan apakah nilai yang sesuai? List down three (2) backup power supply for PSTN. What is the function of earthing and what is the suitable value? (3 Markah / Marks) b) Bagi proses kendalian ibusawat Stored Program Control (SPC), nyatakan tiga (3) kelebihan dan tiga (3) kekurangan bagi system tersebut./ For process the exchanges "Stored Program Control" (SPC), list (3) Advantages dan Disadvantages of SPC Exchange. (4 Markah / Marks) c) Hirarki Switching. /Switching Hierarchy. (3 Markah / Marks) 3. a) Lakarkan dengan gambarajah untuk terangkan panggilan berjaya ISUP. ISUP successful Ordinary Call Set-up-en bloc operation. (5 Markah / Marks) b) Penerangan mengenai Signal (ISUP). / Explanation of the signals (ISUP) IAM - Initial Address Message SAM - Subsequent Address Message ACM Address Complete Message ANC Answer, Charge (5 Markah / Marks) SHMA/MFI/ AN / SAI /SMW Page 9 of 13
4. a) Apakah yang dimaksudkan dengan keamatan panggilan. What does it means with call intensity. b) Dapatkan keamatan panggilan bagi system telefoni yang mempunyai kesesakan trafik sebanyak 6000 panggilan dan purata masa kesesakan adalah 10 minit. Diberi rumus. Get the call intensity for the telephony that consist of traffic congestion of 6000 cells and average congestion time of 10minutes. The given formula. λ = A/S A = keamatan trafik s = tempoh purata (saat) perkhidmatan panggilan (3 Markah / Marks) c) Sebanyak 3256 bilangan panggilan yang telah dicuba pada satu kumpulan saluran pada jam sibuk. Hanya 3150 panggilan yang Berjaya dilakukan pada jam sibuk tersebut. Kirakan gred perkhidmatan bagi saluran tersebut./ As many 3256 cells have tried on a group of channel in peak hour. Only 3150 cells are success in the peak hour. Calculate the service grade for the channel. B = P-T P B - Gred perkhidmatan P - Bilangan panggilan yang dicuba pada jam sibuk T - Bilangan panggilan yang berjaya pada jam sibuk SHMA/MFI/ AN / SAI /SMW Page 10 of 13
d) Satu syarikat telah menerima 183 panggilan masuk dalam jangkamasa purata 3.5 minit. Kirakan trafik keluar sekiranya jumlah trafik adalah 15.5E. Diberi rumus./ A company receives 183 incoming call in average interval of 3.5minutes.Calculate the outgoing traffic if the total traffic is 15.5E. It is given the formula. A = Ch (Unit: Erlang) T A Keamatan Trafik dalam Erlang (traffic intensity) C Purata bilangan panggilan sepanjang masa, t. h = Purata masa bagi tempoh penahanan (holding time) (3 Markah / Marks) 5. a) Apakah Rangkaian Generasi Baru (NGN). What is Next Generation Network (NGN)? b) Rekabentuk sistem NGN./ NGN System Architecture. c) Rekabentuk rangkaian NGN./ NGN Network Architecture d) Ciri-ciri NGN./ Characteristics of NGN (Next Generation Network) e) Protokol yang terdapat dalam sistem NGN. Common Protocols in NGN system SHMA/MFI/ AN / SAI /SMW Page 11 of 13
BAHAGIAN D : KAJIAN KES / ESEI - (30 MARKAH) SECTION D : CASE STUDY / ESSEI - (30 MARKS) ARAHAN : JAWAB SATU (1) SOALAN SAHAJA. INSTRUCTION : ANSWER ONE (1) QUESTION ONLY. Soalan / Question 1 1. Proses Panggilan Jauh (STD) Panggilan Nasional Dengan menggunakan rajah blok, tunjukkan panggilan Nasional dilaksanakan iaitu dari pelanggan (A) yang berada di kawasan Terengganu mendail/menelefon rakannya (B) yang berada di Sarawak. Serta tunjukkan juga laluan speech dan laluan signaling. Maklumat yang disediakan dapat membantu, untuk menunjuk panggilan nasional tersebut. By using the block diagram, show the National call from a customer (A) who is in the area of Terengganu, dial / call customer (B) which are in the state of Sarawak. And also show the speech path and signaling path. STMDT STMDL TGDT TGDL TL/TRMSTP (30 Markah / Marks) SHMA/MFI/ AN / SAI /SMW Page 12 of 13
2. Anda sebagai Jurutera Telekomunikasi TM, diminta untuk design network baru bagi TM iaitu, NGN (Network Generatiom Network) tanpa membuang network PSTN. Design tersebut perlu dilakarkan dalam bentuk blok diagram, maklumat dibawah ini diberikan bagi membantu untuk design network tersebut. You as a Telecommunications Engineer TM, are asked to design a new network for TM's, NGN (Network Generatiom Network) without removing the PSTN network. The design should be drawn in block diagram form, the information below is provided to help to design the network. DLS A DTS A MG A STP 1 SS 1 ATM Network DLS B DTS B MG B STP 2 DTS C DTS - D (30 Markah / Marks) End of Page. SHMA/MFI/ AN / SAI /SMW Page 13 of 13